Lotus Domino Upgrade

Dear Expert

Need your help, My company plan to upgrade Lotus Domino from version R7.02 to R8.0/R8.01

Currently we have two server, one is email server and second one is for application.Both are production server and sit on Linux Suse 10.x.

1)May I know the best practise step by step to upgrade Domino Server and Client from R7.02 to R8 ?

  1. Domino R8 Upgrade version, is it exist?

thanks